An unknown Kesha (known then as Ke$ha) sang on Flo-Rida's #1 hit "Right Round," but refused to appear in the video because she wanted to make a name for herself.
"Tainted Love" started as a 1964 soul song by Gloria Jones, became a huge hit when Soft Cell covered it in 1981, and was the basis for Rihanna's 2006 #1 "S.O.S. (Rescue Me)."
Paula Abdul's "Forever Your Girl" was written by Oliver Leiber, who despite being the son of Jerry Leiber from Leiber & Stoller, was an unknown songwriter.
Kid Rock performed his song "Amen" at Barack Obama's inaugural, but claims he didn't vote for him.
"99 Luftballons" by Nena is about a Cold War scare when balloons showed up on radar and were mistaken as a nuclear threat.
The White Stripes song "We're Going To Be Friends" is very innocent, but Jack White feared it would be interpreted cynically. It wasn't, and was even adapted into a children's book.
Richie talks about producing the first two Kiss albums, recording "Brother Louie," and the newfound appreciation of his rock band, Dust.
"Great songwriters don't necessarily have hit songs," says Chris. He's written a bunch, but his fans are more interested in the intricate jams.
Graham Nash tells the stories behind some of his famous songs and photos, and is asked about "yacht rock" for the first time.
Since his debut single "I'm On Fire" in 1975, Dwight has been providing Spinal-Tap moments and misadventure.
Lots of life lessons in these Eagles lyrics - can you match them to the correct song?
Cain talks about the divine inspirations for "Don't Stop Believin'" and "Faithfully."